The present invention provides a tooth whitening oral care composition comprising: (i) a dye having a blue to blue-violet color with a hue angle in the CIELAB system ranging from 200 to 320 degrees; (ii) core shell silica particles, wherein each core shell silica particle comprises a silica core, and a surface of the silica core is etched with metal silicate; (iii) an orally acceptable carrier vehicle comprising a non-aqueous solvent; and wherein the composition comprises water in an amount of from 3 weight % to 30 weight %.

Claims

12 · 1 independent · depth 3

12 granted claims

›1.independentA tooth whitening oral care composition comprising: (i) a dye having a blue to blue-violet color with a hue angle in the CIELAB system ranging from 20…+11

›2.↳ 1The composition according to claim 1 , wherein the metal silicate for each core shell silica particle is: i) a metal silicate of a monovalent metal io…d2+1

›4.↳ 1The composition according to claim 1 , wherein the metal silicate comprises the formula M 1 2 SiO3.x H 2 O, wherein M 1 is a monovalent metal ion, opt…d2

›5.↳ 1The composition according to claim 1 , wherein the outer 10 nm depth of a core shell silica particle has the general formula: (SiO 2 ) p [O o *N + H +…d2

›6.↳ 1The composition according to claim 1 , wherein the metal silicate comprises a silicate of a group 2 metal ion, a transition metal ion, a group 13 meta…d2+1

›7.↳ 1The composition according to claim 1 , wherein the metal silicate comprises the formula M 2 SiO3.x H 2 O, wherein M 2 is a divalent metal ion selected…d2

›9.↳ 1The composition according to claim 1 , wherein the d(0.5) value of the core shell silica particles ranges from 5 nm to 50 μm.d2

›10.↳ 1The composition of claim 1 , wherein the amount of core shell silica particles is 0.001 to 10 weight % of the composition.d2

›11.↳ 1The composition of claim 1 , wherein the dye comprises from 0.001 to 2 weight % of the composition.d2

›12.↳ 1The composition according to claim 1 , wherein the dye comprises a metal ion.d2

Classifications

7 codes

IPC · International Patent Classification

Section A — Human necessities

A61K8/81
A61K8/34
A61K8/19
A61K8/25
A61K8/46
A61K8/02
A61Q11/00

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Pendency

3.6 y

1,320 days filing → grant

Office actions

after a restriction

Responses

2 RCE

Examiner

Walter E Webb

art unit 1612 · TC 1600

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Citations: 34 back · 0 forward

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Priority chain

2 priority documents

Priority

20 Dec 2013

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61918925	20 Dec 2013
related publication	US 20160331653 A1	17 Nov 2016

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